1 /*- 2 * Copyright (c) 2003-2007 Tim Kientzle 3 * Copyright (c) 2006 Rudolf Marek SYSGO s.r.o. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "archive_platform.h" 28 __FBSDID("$FreeBSD: src/lib/libarchive/archive_write_set_format_cpio_newc.c,v 1.4 2008/03/15 11:04:45 kientzle Exp $"); 29 30 #ifdef HAVE_ERRNO_H 31 #include <errno.h> 32 #endif 33 #include <stdio.h> 34 #ifdef HAVE_STDLIB_H 35 #include <stdlib.h> 36 #endif 37 #ifdef HAVE_STRING_H 38 #include <string.h> 39 #endif 40 41 #include "archive.h" 42 #include "archive_entry.h" 43 #include "archive_private.h" 44 #include "archive_write_private.h" 45 46 static ssize_t archive_write_newc_data(struct archive_write *, 47 const void *buff, size_t s); 48 static int archive_write_newc_finish(struct archive_write *); 49 static int archive_write_newc_destroy(struct archive_write *); 50 static int archive_write_newc_finish_entry(struct archive_write *); 51 static int archive_write_newc_header(struct archive_write *, 52 struct archive_entry *); 53 static int format_hex(int64_t, void *, int); 54 static int64_t format_hex_recursive(int64_t, char *, int); 55 56 struct cpio { 57 uint64_t entry_bytes_remaining; 58 int padding; 59 }; 60 61 struct cpio_header_newc { 62 char c_magic[6]; 63 char c_ino[8]; 64 char c_mode[8]; 65 char c_uid[8]; 66 char c_gid[8]; 67 char c_nlink[8]; 68 char c_mtime[8]; 69 char c_filesize[8]; 70 char c_devmajor[8]; 71 char c_devminor[8]; 72 char c_rdevmajor[8]; 73 char c_rdevminor[8]; 74 char c_namesize[8]; 75 char c_checksum[8]; 76 }; 77 78 /* 79 * Set output format to 'cpio' format. 80 */ 81 int 82 archive_write_set_format_cpio_newc(struct archive *_a) 83 { 84 struct archive_write *a = (struct archive_write *)_a; 85 struct cpio *cpio; 86 87 /* If someone else was already registered, unregister them. */ 88 if (a->format_destroy != NULL) 89 (a->format_destroy)(a); 90 91 cpio = (struct cpio *)malloc(sizeof(*cpio)); 92 if (cpio == NULL) { 93 archive_set_error(&a->archive, ENOMEM, "Can't allocate cpio data"); 94 return (ARCHIVE_FATAL); 95 } 96 memset(cpio, 0, sizeof(*cpio)); 97 a->format_data = cpio; 98 99 a->pad_uncompressed = 1; 100 a->format_name = "cpio"; 101 a->format_write_header = archive_write_newc_header; 102 a->format_write_data = archive_write_newc_data; 103 a->format_finish_entry = archive_write_newc_finish_entry; 104 a->format_finish = archive_write_newc_finish; 105 a->format_destroy = archive_write_newc_destroy; 106 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_NOCRC; 107 a->archive.archive_format_name = "SVR4 cpio nocrc"; 108 return (ARCHIVE_OK); 109 } 110 111 static int 112 archive_write_newc_header(struct archive_write *a, struct archive_entry *entry) 113 { 114 struct cpio *cpio; 115 const char *p, *path; 116 int pathlength, ret; 117 struct cpio_header_newc h; 118 int pad; 119 120 cpio = (struct cpio *)a->format_data; 121 ret = 0; 122 123 path = archive_entry_pathname(entry); 124 pathlength = strlen(path) + 1; /* Include trailing null. */ 125 126 memset(&h, 0, sizeof(h)); 127 format_hex(0x070701, &h.c_magic, sizeof(h.c_magic)); 128 format_hex(archive_entry_devmajor(entry), &h.c_devmajor, sizeof(h.c_devmajor)); 129 format_hex(archive_entry_devminor(entry), &h.c_devminor, sizeof(h.c_devminor)); 130 if (archive_entry_ino(entry) > 0xffffffff) { 131 archive_set_error(&a->archive, ERANGE, "large inode number truncated"); 132 ret = ARCHIVE_WARN; 133 } 134 135 format_hex(archive_entry_ino(entry) & 0xffffffff, &h.c_ino, sizeof(h.c_ino)); 136 format_hex(archive_entry_mode(entry), &h.c_mode, sizeof(h.c_mode)); 137 format_hex(archive_entry_uid(entry), &h.c_uid, sizeof(h.c_uid)); 138 format_hex(archive_entry_gid(entry), &h.c_gid, sizeof(h.c_gid)); 139 format_hex(archive_entry_nlink(entry), &h.c_nlink, sizeof(h.c_nlink)); 140 if (archive_entry_filetype(entry) == AE_IFBLK 141 || archive_entry_filetype(entry) == AE_IFCHR) { 142 format_hex(archive_entry_rdevmajor(entry), &h.c_rdevmajor, sizeof(h.c_rdevmajor)); 143 format_hex(archive_entry_rdevminor(entry), &h.c_rdevminor, sizeof(h.c_rdevminor)); 144 } else { 145 format_hex(0, &h.c_rdevmajor, sizeof(h.c_rdevmajor)); 146 format_hex(0, &h.c_rdevminor, sizeof(h.c_rdevminor)); 147 } 148 format_hex(archive_entry_mtime(entry), &h.c_mtime, sizeof(h.c_mtime)); 149 format_hex(pathlength, &h.c_namesize, sizeof(h.c_namesize)); 150 format_hex(0, &h.c_checksum, sizeof(h.c_checksum)); 151 152 /* Non-regular files don't store bodies. */ 153 if (archive_entry_filetype(entry) != AE_IFREG) 154 archive_entry_set_size(entry, 0); 155 156 /* Symlinks get the link written as the body of the entry. */ 157 p = archive_entry_symlink(entry); 158 if (p != NULL && *p != '\0') 159 format_hex(strlen(p), &h.c_filesize, sizeof(h.c_filesize)); 160 else 161 format_hex(archive_entry_size(entry), 162 &h.c_filesize, sizeof(h.c_filesize)); 163 164 ret = (a->compressor.write)(a, &h, sizeof(h)); 165 if (ret != ARCHIVE_OK) 166 return (ARCHIVE_FATAL); 167 168 /* Pad pathname to even length. */ 169 ret = (a->compressor.write)(a, path, pathlength); 170 if (ret != ARCHIVE_OK) 171 return (ARCHIVE_FATAL); 172 pad = 0x3 & - (pathlength + sizeof(struct cpio_header_newc)); 173 if (pad) 174 ret = (a->compressor.write)(a, "\0\0\0", pad); 175 if (ret != ARCHIVE_OK) 176 return (ARCHIVE_FATAL); 177 178 cpio->entry_bytes_remaining = archive_entry_size(entry); 179 cpio->padding = 3 & (-cpio->entry_bytes_remaining); 180 181 /* Write the symlink now. */ 182 if (p != NULL && *p != '\0') { 183 ret = (a->compressor.write)(a, p, strlen(p)); 184 if (ret != ARCHIVE_OK) 185 return (ARCHIVE_FATAL); 186 pad = 0x3 & -strlen(p); 187 ret = (a->compressor.write)(a, "\0\0\0", pad); 188 } 189 190 return (ret); 191 } 192 193 static ssize_t 194 archive_write_newc_data(struct archive_write *a, const void *buff, size_t s) 195 { 196 struct cpio *cpio; 197 int ret; 198 199 cpio = (struct cpio *)a->format_data; 200 if (s > cpio->entry_bytes_remaining) 201 s = cpio->entry_bytes_remaining; 202 203 ret = (a->compressor.write)(a, buff, s); 204 cpio->entry_bytes_remaining -= s; 205 if (ret >= 0) 206 return (s); 207 else 208 return (ret); 209 } 210 211 /* 212 * Format a number into the specified field. 213 */ 214 static int 215 format_hex(int64_t v, void *p, int digits) 216 { 217 int64_t max; 218 int ret; 219 220 max = (((int64_t)1) << (digits * 4)) - 1; 221 if (v >= 0 && v <= max) { 222 format_hex_recursive(v, (char *)p, digits); 223 ret = 0; 224 } else { 225 format_hex_recursive(max, (char *)p, digits); 226 ret = -1; 227 } 228 return (ret); 229 } 230 231 static int64_t 232 format_hex_recursive(int64_t v, char *p, int s) 233 { 234 if (s == 0) 235 return (v); 236 v = format_hex_recursive(v, p+1, s-1); 237 *p = "0123456789abcdef"[v & 0xf]; 238 return (v >>= 4); 239 } 240 241 static int 242 archive_write_newc_finish(struct archive_write *a) 243 { 244 struct cpio *cpio; 245 int er; 246 struct archive_entry *trailer; 247 248 cpio = (struct cpio *)a->format_data; 249 trailer = archive_entry_new(); 250 archive_entry_set_nlink(trailer, 1); 251 archive_entry_set_pathname(trailer, "TRAILER!!!"); 252 er = archive_write_newc_header(a, trailer); 253 archive_entry_free(trailer); 254 return (er); 255 } 256 257 static int 258 archive_write_newc_destroy(struct archive_write *a) 259 { 260 struct cpio *cpio; 261 262 cpio = (struct cpio *)a->format_data; 263 free(cpio); 264 a->format_data = NULL; 265 return (ARCHIVE_OK); 266 } 267 268 static int 269 archive_write_newc_finish_entry(struct archive_write *a) 270 { 271 struct cpio *cpio; 272 int to_write, ret; 273 274 cpio = (struct cpio *)a->format_data; 275 ret = ARCHIVE_OK; 276 while (cpio->entry_bytes_remaining > 0) { 277 to_write = cpio->entry_bytes_remaining < a->null_length ? 278 cpio->entry_bytes_remaining : a->null_length; 279 ret = (a->compressor.write)(a, a->nulls, to_write); 280 if (ret != ARCHIVE_OK) 281 return (ret); 282 cpio->entry_bytes_remaining -= to_write; 283 } 284 ret = (a->compressor.write)(a, a->nulls, cpio->padding); 285 return (ret); 286 } 287